Actions that target enemies need you to face the enemy to use them, but actions that target party members like healing spells don't need you to face the party member to be used. You can cast a healing spell while facing away from them and it will still heal them. This means auto-face is useful for dps actions but there is no reason to need to auto-face a friendly target
It's really annoying because in standard movement auto face will make you turn while you are running. So using skills and abilities on party members while running for a mechanic can make you turn and mess up just because the game has an annoying movement quirk.
Please make auto-face target only make face the target when targetting enemies, not friendly targets